In many species of gymnosperms airborne pollen is captured by pollination
drops.
Pollination drops are secreted from ovules (which develop into seeds).Only Cycas photograph was taken in Iriomote island.

Collection of pollination drop photographs

Taxus brevifolia 1

Taxus brevifolia 2

Taxus brevifolia 3

Juniperus communis

Juniperus virginiana

Sequoiadendron giganteum

Sciadopitys verticillata

Juniperus squamata

Sequoia sempevirens

Thuja plicata

Sequoiadendron giganteumSEM

Cunninghamia lanceolata

Cupressus arizonica

Cycas revoluta

Podocarpus macrophyllus

Taxodium distichum

Torreya nucifera

Supported by Arnold Arboretum of Harvard University, Harvard University
and University of Victoria (UVic)